Igniter.



. PEARSON.

IGNITEB.. APPLIUATION HLED JULY 27. 1909.

Patented Mar. 29, 19W,

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/Nr/ENroH 0270 Psamalz ATTORNEYS' W/TNESSES UllllED STATES PATENT FFIC.

OTT@ PEAR-SON, F `WORCftlllEIR, MASSACHUSETTS.

TG'NITER.

Specification of Letters Patent. Patented D131'. 29, 1910.

Application filed July 27, 1909. Serial No. 503,821.

To all whom may concern;

Be it known that l, U'r'ro lnansox, a subject ot the lling ot' Sweden. and a resident may enter ot lforialster, in the county of lvllorcester and rita-te ot lliassachusetts, have invented a new and improved lgniter, of which the following is a tull, clear, and exact description.

'This invention relates to certain improvements in igniters for internal combustion engines, and more particularly to a typeoli igniter in which the. heat of one explosion is conserved and utilized in the ignition of the next succeeding charge.

.ln my improved engine` l deliver the crude oil or other t'uel directly to the iuterior ot the engine and vaporize. it hy the .heut remaining 'from the last prior explosion. The ,tuel is preferably admitted simultaneously with the air, and the liquid strikes upon a heated hatlle plate supported below the inlet valve. To vtacilitate the heating oi' this plateand to avoid any interterence with the proper working of the valves, l preterably si'lpport the plate directly upon the igniter, which latter comprises a hollow hody containing av lieal-con serving material.

lteterenee to he had to the accompanying drawings, forming a part of this specification, in which similar characters oit refer! eure indicate corresponding parts in all the figures, and in which*- Figure l is a vertical section through the inlet, exhaust and igniting means 01",' an engine embodying my invention; liig. 2 is a. transverse si :tion on the line 2 2 of Fig. 1; and Fig. f5 is an inner end view of my improved igniter and heating plate.

ln the specilic cmistruction illustrated` the interior olf the engine cylinder is provided with a chamber or recess 10, adjacent the cyliiider head, and the walls thereof` constitute a valve casing serving for the delivery ot the fresh charge to the cylinder and the escape et the exhaust gas from the cylinder. A plug 11 is screwed into the upper wall, and this plug has a passage therethrough and a valve seat at its inner end closed by an inwardly-opening inlet valve 12. A, small passage 13 leads to the valve seat, so as to be normally closed by the inlet valve. A fuel delivery conduit 14 leads to this passage and is provided with a turnir plu g 15 for shutting ofi the supply of fuel independent-ly of the valve 1,2.

Upon 'opening the inlet valve, liquid fuel may enter through the passage 13 and air through the body of the plug, so that the two will become mixed as they enter the engine cylinder. Directly below the inlet valve is an upwardly and inwardlyniovahle exhaust valve 16, normally held to its seat but mechanically opened in any suitable manner to permit. the escape of the exhaust Secured to the end of the engine casting and closing the end ot' the recess 10, is a casing 17 containing my improved igniter, This casing is substantially cylindrical in cross section and within the casing is a cylindrical metal sleeve 18, having the end toward the recess 10 closed and having the end toward the outer end walllof the casing open. The sleeve loosely ts the casing but is prevented from any material longitudinal or rotative movement by a lug 19 at the inner end of the sleeve. This lug extends radially in respect to the sleeve and lits in a groove in the outer surface of the engine casting'. The upper end of the lug terminates at approximately the center of the sleeve and upon approximately the level of the lower Wall or floorv of the recess 10. lllithin the sleeve is asecond sleeve 20, preferably formed of refractory material, for instance, lava, which when heated will conserve the heat for a considerable time. The inner sleeve 20 is hollow and open at both ends, although one end abuts against the outer end Wall of the casing 17 The inner surface of the outer sleeve 18 is preferably provided with a series of longitudinal corrugations, so as to provide longitudinal air chambers hetween the tivo sleeves. The cor-- rugations extend inwardly to engage 'with the outer surface ot' the inner sleeve 20, to support the latter. A tube 21 extends through the end wall of the casing substantially in alinement with thc hollow center of the sleeve 20, and serves for the delivery of flame or hot gas to the interior ot the sleeve to preliminar-uy heat the latter before starting the engine in operation. After the two concentric sleeves have been highly heated in this manner, the engine may be readily started without the aid of the other ignitingmeans. In case it is not convenient to preliminarily heat the igniter in this manner, an ordinary spark plug 22 may be employed upon starting the engine and until the other gniter becomes heated to the ilo desired temperature. A sleeve or tube 18 is maintained at a high temperature and serves to ignite the gas by direct Contact therewith when the gas is eoi'npressed. The inner slee-ve 20 serves to conserve the heat pai'- tieularly when the latter is being' heated by I plate beingl supported solely by the igniter is slightly heated and tends to vaporize the fuel, so that a rapid and uniform mixture ot the latter will be obtained during the admission of the air. As far as the operation ot the ignlter itself is concerned; this bafle plate 23 might be supported'troin the side Walls of the recess l0 rather ilian from the end of the igniter itself. It might be supported directly upon and constitute a part of the exhaust valve, as illustrated in my prior patent, No. 942,58?, issued December 7, 1909, although. l preferably support it independently of said exhaust valve, so as not to interfere with the free inoi'enient ot' the latter.

Having thus described my invention, l`

elaiin as new and desire to secure by Letters Patent An internal Combustion engine having a Valve easing7 a easing)r secured thereto and closing one end of said valve easing, an inlet valve al. the upper side of said valve easing, separate air and liquid passages leading to said inlet valve and both controlled thereby, an exhaust valve at the lower side ol" said valve easing, a hollow sleeve within said second-mentioned easing and having i lug at one end thereof for engaging with the side of the valve easing' tor preventing longitudinal movement of said sleeve and preventing rotation thereof, a refractory body within said sleeve and a sheet metal vaporizing` plate extending between the inlet valve and said exhaust valve and receiving the liquid fuel upon the opening oli' the inlet Valve.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

OTT@ PFARSON.

Witnesses:

AUGUST SELEN, ERHABD B. ARNsTiioM. 

